BREAKING: House Judiciary Committee releases full impeachment report
How Tow Listeners Detect Pingers
02:23Robert Hager, who covered aviation for NBC News for 25 years, explains how a Towed Pinger Locator detects a black box underwater.
BREAKING: House Judiciary Committee releases full impeachment report
Robert Hager, who covered aviation for NBC News for 25 years, explains how a Towed Pinger Locator detects a black box underwater.